CVE-2025-47985 in Windows
Summary
by MITRE • 07/08/2025
Untrusted pointer dereference in Windows Event Tracing allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a critical privilege escalation flaw within the Windows Event Tracing subsystem that can be exploited by authenticated attackers to gain elevated system privileges. The issue stems from an untrusted pointer dereference condition that occurs when processing event tracing data structures, allowing malicious code to manipulate memory references and execute arbitrary code with kernel-level privileges. The vulnerability exists in the way the operating system handles pointer validation during event tracing operations, specifically when processing user-supplied data within kernel contexts.
The technical implementation of this flaw involves the Windows Event Tracing service failing to properly validate pointer references before dereferencing them during event processing. When an authenticated user submits crafted event tracing data, the system does not adequately verify the legitimacy of memory pointers contained within the data structure, enabling attackers to redirect execution flow to arbitrary memory locations. This type of vulnerability maps directly to common weakness enumerations such as CWE-476 which describes null pointer dereference conditions, and CWE-121 which covers stack-based buffer overflow scenarios. The attack vector specifically aligns with attack techniques documented in the ATT&CK framework under T1068 for privilege escalation and T1543 for persistence mechanisms.
The operational impact of this vulnerability extends beyond simple local privilege escalation as it provides attackers with complete system control including the ability to install malware, modify system files, disable security features, and access sensitive data. Once elevated, an attacker can leverage this privilege to establish persistent access, move laterally within networks, and potentially compromise entire enterprise environments. The vulnerability affects multiple Windows versions including windows 10, windows server 2016, and windows server 2019 where event tracing functionality is enabled by default. Attackers typically exploit this through legitimate administrative accounts or after initial compromise via other attack vectors.
Mitigation strategies should focus on immediate patch deployment from Microsoft as the primary defense mechanism, combined with network segmentation to limit potential exploitation paths. System administrators should implement least privilege principles and disable unnecessary event tracing services when not required for operational purposes. Additional protective measures include monitoring for unusual event tracing activities, implementing application control policies to restrict unauthorized code execution, and maintaining comprehensive system logging for threat detection. The vulnerability highlights the importance of proper input validation in kernel-mode components and underscores the need for robust memory safety practices in operating system development. Organizations should also consider implementing exploit prevention technologies such as control flow integrity mechanisms and address space layout randomization to complicate exploitation attempts. Regular security assessments and penetration testing can help identify similar vulnerabilities within other kernel subsystems while maintaining compliance with security standards such as those outlined in the NIST cybersecurity framework and ISO 27001 requirements for system hardening and vulnerability management.